Linux creer un fs

Bonjour,

merci de m'aider creer un FS

root@bodhi32-Aspire-5315:/home/bodhi32# uname -a
Linux bodhi32-Aspire-5315 3.8.0-12-generic #21 SMP Sun Mar 17 16:34:24 CDT 2013
i686 i686 i386 GNU/Linux

root@bodhi32-Aspire-5315:/home/bodhi32# more /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda1 during installation
UUID=107d8a6b-1e37-4562-a3a4-211b874cec99 / ext4 errors=remoun
-ro 0 1
# swap was on /dev/sda5 during installation
UUID=5b8f8685-8c5f-4d6c-bc11-f0b92e76b11c none swap sw
0 0

root@bodhi32-Aspire-5315:/home/bodhi32# df -TH
Filesystem Type Size Used Avail Use% Mounted on
/dev/sda1 ext4 77G 1.7G 71G 3% /
udev devtmpfs 1.1G 4.1k 1.1G 1% /dev
tmpfs tmpfs 421M 852k 421M 1% /run
none tmpfs 5.3M 0 5.3M 0% /run/lock
none tmpfs 1.1G 0 1.1G 0% /run/shm

avec la commande mkfs j 'arrive pas
merci de voir